Note 6 - Goodwill and Intangible Assets - Acquired Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Goodwill	$ 19,460	$ 19,460
Core deposit intangibles, gross carring amount	5,634	5,634
Core deposit intangibles, accumulated amortization	4,735	4,551
Total, gross carring amount	$ 25,094	$ 25,094